import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login'
import Home from '../components/Home'
Vue.use(VueRouter)
const routes = [
  {
    path: '/',
    redirect: '/login'
  },
  {
    name: 'Login',
    path: '/login',
    component: Login
  },
  {
    name: 'Home',
    path: '/home',
    component: Home
  }
]
const router = new VueRouter({
  mode: 'history',
  base: process.env.BASE_URL,
  routes
})
// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
  // to表示将要访问的路径
  // from表示表示从哪里的跳转而来
  // next是一个函数，表示放行  next（）放行  next("/login") 强制跳转
  if (to.path === '/login') {
    return next()
  } else {
    const token = window.sessionStorage.getItem('token')
    if (!token) {
      return next('/login')
    }
    next()
  }
})
export default router
